[mirror_ubuntu-bionic-kernel.git] / tools / objtool / elf.h

/*
 * Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#ifndef _OBJTOOL_ELF_H
#define _OBJTOOL_ELF_H

#include <stdio.h>
#include <gelf.h>
#include <linux/list.h>
#include <linux/hashtable.h>

#ifdef LIBELF_USE_DEPRECATED
# define elf_getshdrnum    elf_getshnum
# define elf_getshdrstrndx elf_getshstrndx
#endif

struct section {
	struct list_head list;
	GElf_Shdr sh;
	struct list_head symbol_list;
	DECLARE_HASHTABLE(symbol_hash, 8);
	struct list_head rela_list;
	DECLARE_HASHTABLE(rela_hash, 16);
	struct section *base, *rela;
	struct symbol *sym;
	Elf_Data *elf_data;
	char *name;
	int idx;
	unsigned long data;
	unsigned int len;
};

struct symbol {
	struct list_head list;
	struct hlist_node hash;
	GElf_Sym sym;
	struct section *sec;
	char *name;
	unsigned int idx;
	unsigned char bind, type;
	unsigned long offset;
	unsigned int len;
};

struct rela {
	struct list_head list;
	struct hlist_node hash;
	GElf_Rela rela;
	struct symbol *sym;
	unsigned int type;
	unsigned long offset;
	int addend;
};

struct elf {
	Elf *elf;
	GElf_Ehdr ehdr;
	int fd;
	char *name;
	struct list_head sections;
	DECLARE_HASHTABLE(rela_hash, 16);
};


struct elf *elf_open(const char *name);
struct section *find_section_by_name(struct elf *elf, const char *name);
struct symbol *find_symbol_by_offset(struct section *sec, unsigned long offset);
struct symbol *find_symbol_containing(struct section *sec, unsigned long offset);
struct rela *find_rela_by_dest(struct section *sec, unsigned long offset);
struct rela *find_rela_by_dest_range(struct section *sec, unsigned long offset,
				     unsigned int len);
struct symbol *find_containing_func(struct section *sec, unsigned long offset);
void elf_close(struct elf *elf);


#endif /* _OBJTOOL_ELF_H */
Commit	Line	Data
442f04c3 JP	1	/*
	2	* Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com>
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation; either version 2
	7	* of the License, or (at your option) any later version.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, see <http://www.gnu.org/licenses/>.
	16	*/
	17
	18	#ifndef _OBJTOOL_ELF_H
	19	#define _OBJTOOL_ELF_H
	20
	21	#include <stdio.h>
	22	#include <gelf.h>
	23	#include <linux/list.h>
042ba73f	24	#include <linux/hashtable.h>
442f04c3	25
2e51f262 JB	26	#ifdef LIBELF_USE_DEPRECATED
	27	# define elf_getshdrnum elf_getshnum
	28	# define elf_getshdrstrndx elf_getshstrndx
	29	#endif
	30
442f04c3 JP	31	struct section {
	32	struct list_head list;
	33	GElf_Shdr sh;
a196e171	34	struct list_head symbol_list;
042ba73f	35	DECLARE_HASHTABLE(symbol_hash, 8);
a196e171	36	struct list_head rela_list;
042ba73f	37	DECLARE_HASHTABLE(rela_hash, 16);
442f04c3 JP	38	struct section base, rela;
	39	struct symbol *sym;
	40	Elf_Data *elf_data;
	41	char *name;
	42	int idx;
	43	unsigned long data;
	44	unsigned int len;
	45	};
	46
	47	struct symbol {
	48	struct list_head list;
042ba73f	49	struct hlist_node hash;
442f04c3 JP	50	GElf_Sym sym;
	51	struct section *sec;
	52	char *name;
042ba73f	53	unsigned int idx;
442f04c3 JP	54	unsigned char bind, type;
	55	unsigned long offset;
	56	unsigned int len;
	57	};
	58
	59	struct rela {
	60	struct list_head list;
042ba73f	61	struct hlist_node hash;
442f04c3 JP	62	GElf_Rela rela;
	63	struct symbol *sym;
	64	unsigned int type;
042ba73f	65	unsigned long offset;
442f04c3 JP	66	int addend;
	67	};
	68
	69	struct elf {
	70	Elf *elf;
	71	GElf_Ehdr ehdr;
	72	int fd;
	73	char *name;
	74	struct list_head sections;
042ba73f	75	DECLARE_HASHTABLE(rela_hash, 16);
442f04c3 JP	76	};
	77
	78
	79	struct elf elf_open(const char name);
	80	struct section find_section_by_name(struct elf elf, const char *name);
	81	struct symbol find_symbol_by_offset(struct section sec, unsigned long offset);
5c51f4ae	82	struct symbol find_symbol_containing(struct section sec, unsigned long offset);
442f04c3 JP	83	struct rela find_rela_by_dest(struct section sec, unsigned long offset);
	84	struct rela find_rela_by_dest_range(struct section sec, unsigned long offset,
	85	unsigned int len);
	86	struct symbol find_containing_func(struct section sec, unsigned long offset);
	87	void elf_close(struct elf *elf);
	88
	89
	90
	91	#endif /* _OBJTOOL_ELF_H */